Research on the ventilation mode of grille in equipment compartment of high-speed train

In the process of high-speed train operation, all kinds of electric equipment in the equipment compartment will produce a large amount of heat, which needs to be cooled by high-speed flow of air, otherwise it will interfere with the normal operation of the electric equipment, and even directly affect the safety of train operation. In this paper, the method of numerical simulation is used to study the ventilation of the grille in the equipment compartment, mainly analyzing the ventilation direction of the grille in different positions in the equipment compartment, the air exchange mechanism at the grille and the reasons for the formation of the air circulation inside and outside the equipment compartment. The study shows that the upstream grille of the equipment compartment is the air outlet, the downstream grille is the air inlet, and the middle grille of the equipment compartment has both air inlet and air outlet phenomenon. Moreover, the high-speed airflow through the grille is in a way of grille around the flow of gas exchange with the equipment compartment. The reason for the formation of airflow circulation inside and outside the equipment compartment is related to the flow separation of the rear end plate of the bogie.